CH-U331TX&RX HDMI/VGA VoIP Transmitter and Receiver (with USB/KVM Extension)

wired extension

Product Features

Compliance Standards

Supports panel control

4K@60Hz

Over IP

Made in Taiwan

Product Introduction

File Download

What is AV over IP?

AV over IP solutions (as shown in the simplified architecture diagram below) enable AV transmission over IP networks, offering virtually unlimited scalability, lower cabling costs, simplified maintenance, and eliminating the limitations of traditional AV matrix systems.

Product Advantages

High-quality audio and video transmission
Facilitates transmission and reception across different distances
Easy future expansion
Remote device control and centralized management
No need for additional storage space, simplifying troubleshooting

Product Appearance

Power Indicator Light
Flashing: Powering on / Steady: Powered on
Link Indicator Light
Off: The device is not connected to the network / Flashing: Connecting to the receiver / Steady: The connection between the transmitter and receiver is stable
RS232 Port: Connect to a computer to send RS-232 commands to an RS-232 controlled device. The default baud rate is 115200bps, and users can configure it as needed.
ISP Maintenance Switch: For manufacturer use only
IR Output: Connect to an IR Blaster to transmit IR signals from the transmitter.
IR Input: Connect to an IR Extender to extend IR control.
IR Receiver: Receives signals from the remote control and transmits them to the IR output.
Return or Link Button: This button has three functions, detailed as follows:
A. Video Return: Press this button to enable or disable VGA loopback output, which can be used for local monitoring of the current VGA or HDMI signal source.
B. Video Link: Press and hold this button for 3 seconds to enable or disable video linking. When video linking is disabled, the display connected to the receiver will show the current system IP address and firmware version.
C. Restore Factory Defaults: Insert the power adapter and hold this button until the POWER and LINK indicators start flashing. (Once both indicators flash, you can restart the device.)
Video Stream and Anti-Dithering Button: This button has two functions, detailed as follows:
A. Video Stream: Press this button to select the video stream mode, switching between Graphic and Video processing modes. The Graphic mode optimizes high-detail static images, while the Video mode optimizes dynamic video.
B. Anti-Dithering: Press and hold this button for 3 seconds to enable anti-dithering, switching between 1-bit, 2-bit, or Off modes. Some graphics cards use dithering technology to simulate more colors, but dithering can make low-bandwidth signal preservation difficult in real-time video compression.
ISP Maintenance Button: For manufacturer use only.
Reboot Button: Press this button to reboot the device (settings will not be reset).
VGA Loopback Output Port: Connect to a VGA display for analog video output, allowing local monitoring of the current VGA or HDMI signal source (non-HDCP encrypted, resolution up to 1080p).

Power Port: Provides power to the device, connects to DV 5V.
USB Port: Connect a USB device to the computer's USB port.
LAN Port: Connect to a network switch to transmit data to compatible receivers or connect to a computer for WebGUI operation.
Note: If the network switch supports PoE (IEEE 802.3af), the device can be powered directly through the network.
VGA Input Port: Connect a VGA source device, such as a desktop or laptop computer.
HDMI Input Port: Connect an HDMI source device, such as a digital media player, gaming console, or set-top box.
LINE Input Port: Connect a CD player or computer to input analog audio.
Note: When a signal source is connected to this input port, the device will embed the audio into the transmitted signal, completely replacing the original HDMI audio.
LINE Output Port: Connect powered speakers or an AV amplifier to output analog audio, capable of playing microphone signal sources from the receiver (limited to unicast mode).

Power Indicator
Flashing: Powering on / Steady: Powered on
Link Indicator Light
Off: The device is not connected to the network / Flashing: Connecting to the receiver / Steady: The connection between the transmitter and receiver is stable
USB 2.0 Port: Connect high-speed USB peripherals such as flash drives.
Note: Isochronous USB transfer is not supported.
USB 1.1 Port: Connect devices such as a keyboard or mouse.
Reboot Button: Press this button to reboot the device (all settings remain unchanged).
Source and Video Stream Button: This button has two functions, detailed as follows:
A. Source: Press this button to select a signal source, switching between HDMI and VGA video signals.
Note: Due to streaming video and HDCP encryption requirements, switching time is at least 6–10 seconds.
B. Video Stream: Press and hold this button for 3 seconds to select the video stream mode, switching between Graphic and Video processing modes.
Channel or Link Button: This button has three functions, detailed as follows:
A. Channel Forward: Press this button to switch to the next available streaming channel in the local network.
※ If no available streaming channel is detected, the channel number will not change.
B. Video Link: Press and hold this button for 3 seconds to enable or disable video linking. When video linking is disabled, the display connected to the receiver will show the current system IP address and firmware version.
C. Restore Factory Defaults: Insert the power adapter and hold this button until the POWER and LINK indicators start flashing.
Channel or USB Button: This button has two functions, detailed as follows:
A. Channel Backward: Press this button to switch to the previous available streaming channel in the local network.
※ If no available streaming channel is detected, the channel number will not change.
B. USB Link: Press and hold this button for 3 seconds to enable or disable USB linking between the transmitter and receiver (limited to multicast mode).
※ In multicast mode, only one receiver at a time can enable the USB link with the transmitter, while other receivers on the same channel will not be able to enable their USB links.
IR Receiver: Can receive infrared signals from any standard remote control and transmit them to the IR output port on the transmitter.
IR Input: When connected to an IR extender, it allows for extended remote control range.
IR Output: When connected to an IR emitter, it transmits received IR signals to the controlled device.
ISP Maintenance Switch: For manufacturer use only.
RS-232 Port: Connect to an RS-232 controlled device to execute RS-232 commands from a computer. The default baud rate is 115200bps, and users can configure it as needed.

Microphone Input Port: Connect a microphone to input analog audio, which is played through the LINE output port on the transmitter (limited to unicast mode).
※ The LINE input port on the transmitter must be connected to a signal source to activate the microphone on the receiver.
LINE Output Port: Connect powered speakers or an AV amplifier to output analog audio from the transmitter’s HDMI or Line-level signal sources, supporting LPCM 2.0 audio.
Optical Output Port: Connect powered speakers or an AV amplifier to output digital audio, supporting LPCM 2.0 & Bitstream audio formats.
HDMI Output Port: Connect to an HDMI display or AV amplifier to output digital video and audio.
VGA Output Port: Connect to a VGA display for analog video output (limited to VGA or non-HDCP encrypted HDMI signal sources).
※ When transmitting 4K@60Hz (YUV 4:2:0) video from a computer, image artifacts may appear.
ISP Maintenance Button: For manufacturer use only.
LAN Ports 1~3: Connect to a network switch to transmit data to compatible receivers or connect to a computer for WebGUI operation.
※ If using PoE (IEEE 802.3af) for power supply, connect to the first port. For daisy-chaining, use any port.
Power Jack: Insert a 5V DC power adapter and connect to an AC power outlet (or use PoE for power supply).

TX Specifications

Supports HDMI 2.0 and DVI 1.0 audio-visual interfaces
Supports HDCP 1.4 and 2.2 encryption technologies
The transmitter features 1× HDMI, 1× VGA input terminals, and 1× VGA Loopback output terminal
Transmits video, audio, and control signals via the TCP/IP protocol, supporting both Unicast (point-to-point) and Multicast (point-to-multipoint) modes
Multi-screen video wall display supports 90° rotation
HDMI input resolution supports up to 4K@60Hz (YUV 4:2:0, 8-bit) or 4K@30Hz (YUV 4:4:4, 8-bit)
Note: 4K@50/60Hz (YUV 4:2:0) input resolution will be automatically converted to 4K@25/30Hz (RGB) output resolution
VGA input and output resolutions support up to WUXGA@60Hz (RB)
HDMI terminals support LPCM 2.0/5.1/7.1 and Bitstream digital audio formats
Note: The optical terminal of the receiver supports LPCM 2.0 and Bitstream digital audio formats
The receiver's microphone analog audio is output from the LINE OUT on the transmitter
Both the transmitter and receiver can obtain power via PoE and need to be connected to a Gigabit network switch that supports PoE (IEEE 802.3af) power supply function
The receiver has 3 LAN ports for daisy-chaining multiple receivers without requiring a Gigabit network switch
Supports USB signal extension for keyboard, mouse, or USB flash drives
Supports infrared and RS-232 signal extension
Features WebGUI, Telnet, and front panel button operation interfaces
Dimensions (W×H×D): 231.5 × 25 × 120 mm
Weight: 666g
Operating temperature: 0˚C ~ 40˚C / 32˚F ~ 104˚F
Storage temperature: -20˚C ~ 60˚C / -4˚F ~ 140˚F

RX Product Specifications

Supports HDMI 2.0 and DVI 1.0 audio-visual interfaces
Supports HDCP 1.4 and 2.2 encryption technologies
Outputs 1× HDMI, 1× VGA
Transmits video, audio, and control signals via the TCP/IP protocol, supporting both Unicast (point-to-point) and Multicast (point-to-multipoint) modes
Multi-screen video wall display supports 90° rotation
HDMI input resolution supports up to 4K@60Hz (YUV 4:2:0, 8-bit) or 4K@30Hz (YUV 4:4:4, 8-bit)
※ 4K@50/60Hz (YUV 4:2:0) input resolution will be automatically converted to 4K@25/30Hz (RGB) output resolution
VGA input and output resolutions support up to WUXGA@60Hz (RB)
HDMI terminals support LPCM 2.0 / 5.1 / 7.1 and Bitstream digital audio formats
Note: The optical terminal of the receiver supports LPCM 2.0 and Bitstream digital audio formats
The receiver's microphone analog audio is output from the LINE OUT on the transmitter
Both the transmitter and receiver can obtain power via PoE and need to be connected to a Gigabit network switch that supports PoE (IEEE 802.3af) power supply function
The receiver has 3 LAN ports for daisy-chaining multiple receivers without requiring a Gigabit network switch
Supports USB signal extension for keyboard, mouse, or USB flash drives
Supports infrared and RS-232 signal extension
Features WebGUI, Telnet, and front panel button operation interfaces
Dimensions (W×H×D): 231.5 × 25 × 120 mm
Weight: 666g
Operating temperature: 0˚C ~ 40˚C / 32˚F ~ 104˚F
Storage temperature: -20˚C ~ 60˚C / -4˚F ~ 140˚F

Network Switch Recommended Model

Brand: NETGEAR
Model: GS728TPP V2

Product Application

Product List

CH-U331TX:

HDMI/VGA VoIP Transmitter (Supports USB/KVM Extension) x1

3.5mm to IR Extender x1

3.5mm to IR Emitter x1

5V/2.6A DC Power Supply x1

User Manual x1

CH-U331RX:

HDMI/VGA VoIP Receiver (Supports USB/KVM Extension) x1

3.5mm to IR Extender x1

3.5mm to IR Emitter x1

5V/4A DC Power Supply x1

Power Cord x1

User Manual x1

※The product specifications and accessories mentioned in the user manual are for reference only. Any changes will not be notified in advance. UPMOST reserves the right to modify product design, accessories, and drivers.

File Download

Date

Type

Operating System

Description

File Download

2019.06.28

Product Catalog

Details

1.3MB

PDF

1. Purpose of Data Collection

The purpose of collecting user personal data by "UPMOST" is for customer management, membership management and marketing, information communication management, e-commerce, internal statistical surveys and analysis, and to collect, process, and use personal data as required by legal obligations. This data collection is carried out through methods such as event registration forms, "Contact Us" forms, or order forms.
2. Types of Personal Data Collected

The types of personal data collected on the "UPMOST" website include C001 Identifiers, C011 Personal Descriptions, and C003 Identifiers in Government Data.
3. Tracking Data and Cookie

The UPMOST website management system will record your IP address, browser type, webpage browsing time, and other tracking data. This data will be stored in accordance with the Personal Data Protection Act.
The purpose of collecting and analyzing user data on the UPMOST website is to understand users' browsing needs and analyze web traffic, which serves as a reference for improving content and system operations. To achieve this and provide users with a more user-friendly service, UPMOST will use cookies to automatically record the pages visited by users and the domain name they are located in. A cookie is a small piece of data sent from a web server to the browser and stored on the computer's hard drive.
Generally, cookies are used to:
1. Estimate the total number of visitors and analyze web traffic; this aggregated and processed traffic data will be provided to online advertisers as a basis for evaluating the effectiveness of advertisements.
2. Track your progress and frequency when participating in promotions, giveaways, and contests. When UPMOST organizes promotional activities using cookies, the data written into the cookies will be used to indicate the participant's progress throughout the entire promotion process and can be used to track participation, submissions, and other related actions in lottery activities.
3. Measure browsing patterns, such as the pages visited on the UPMOST website and the accumulated traffic. UPMOST uses this data to understand user habits and preferences, in order to provide more up-to-date information (including advertisements and promotions) and offer more user-friendly services.
4. Users can configure their browser settings to be notified when a cookie is set or to reject the setting of cookies.
4. How does UPMOST use my data?

1. The primary purpose of UPMOST collecting personal data is for reference use in activities, including information services, newsletter services, personalized services, consumer discount services, interactive communication, and many other types of services. Personal data will be retained during the operation of the UPMOST website. By understanding the users, UPMOST will provide better content and more user-friendly services.
2. The personal data provided by users will be used by UPMOST to periodically or occasionally send activity and information service updates through email, phone, and other media. Users have the right to decide whether they wish to participate in the activities offered by UPMOST. If users do not wish for their data to be used, they can email service@upmost.com.tw, and UPMOST will stop sending related information as per the user's request.
3. When you participate in promotions, giveaways, lotteries, or contests organized by UPMOST independently or in partnership with others, please ensure that the information you provide is correct, as inaccurate information may affect your eligibility to participate or claim prizes. The data collected during these activities will be protected in accordance with applicable laws and this statement.
5. Whom does UPMOST collaborate with to collect user data?

When users enter personal data on the UPMOST website, except in the cases listed below or unless UPMOST makes a special statement, the user's personal data will only be used within the UPMOST website. Additionally, if the data is collected or maintained by a third party through a link on the UPMOST website, UPMOST will obtain the user's consent prior to the collection or transmission of the data.
Some promotional activities on the UPMOST website may be organized by third-party entities other than UPMOST, or co-organized by UPMOST and third parties. In such cases, some or all of the data collected during these activities may be shared with partners, allowing them to provide the services that users need in real-time. If users do not wish for their data to be shared, they can choose not to participate in the service or promotional activity.
6. The rights and methods that users can exercise regarding the personal data they provide to the company are as follows:

(1) Request to inquire or access.
(2) Request a copy of the data.
(3) Request to supplement or correct.
(4) Request to stop the collection, processing, or use of data.
(5) Request to delete.
Users can process this through the member information area on the UPMOST website or send an email to service@upmost.com.tw.
7. How does UPMOST protect my personal data?

1. UPMOST is committed to protecting the privacy and security of users' personal data. UPMOST will only provide users' personal data to business partners and sponsors with the user's "consent."
2. If a user's data is to be shared with a third party, UPMOST will notify the user before the data is used. If the user does not wish for their data to be shared, they can choose not to use specific services or not participate in certain promotional activities or contests.
8. Changes to the contents of this statement.

UPMOST reserves the right to amend this statement. When UPMOST makes changes to the collection, processing, or use of personal data, the content of this webpage will be updated, and relevant changes will be notified to users via the email provided. If no objection is raised, it will be considered as your agreement to this statement.
If you have any questions regarding this statement, please email service@upmost.com.tw, and UPMOST will respond as soon as possible.

Intellectual Property Rights Disclaimer of the Website

All copyrights, patents, trademarks, and other intellectual property rights in the works, data, content, programs, and website design arrangements on the UPMOST website are owned by UPMOST or its authorized legitimate rights holders, and are intended for personal and non-commercial browsing only. Any information, software, products, or services obtained from this website may not be modified, copied, distributed, transmitted, displayed, performed, reproduced, published, licensed, created into derivative works, edited, disseminated, transmitted, or used for any other purposes, including rental, sale, or other purposes. Any violation will result in the user assuming all legal responsibilities, and UPMOST reserves the right to seek compensation in accordance with the law. If any attempt is made to disrupt or interfere with the data and functions on the UPMOST website, or to invade or damage any network systems, UPMOST will take legal action accordingly.

Newsletter Subscription Terms

1. UPMOST provides newsletter information, and by subscribing to the newsletter, it will obtain your email address, which may directly or indirectly identify your personal information.
2. The company will collect, process, and use your personal data in accordance with the Personal Data Protection Act and relevant laws, based on the company's privacy protection policy.
3. The company will update the privacy protection policy in accordance with legal requirements and business operations needs. These updates will not be separately notified. Such updates will not affect your rights as outlined under the Personal Data Protection Act.
4. You agree that UPMOST may use the personal information you provide to verify your identity, contact you, provide UPMOST-related services and information, and use your data in accordance with other practices outlined in the privacy protection policy.
5. You may, in accordance with the Personal Data Protection Act, request UPMOST to:
(1) Request to inquire or view your data.
(2) Request to obtain a copy of the data.
(3) Request to supplement or correct the data.
(4) Request to stop the collection, processing, and use of data.
(5) Request deletion.
However, if exercising the above rights results in a reduction of your benefits from UPMOST's electronic newsletter services, UPMOST will not be liable for compensation. Additionally, in accordance with Article 14 of the Personal Data Protection Act, the company may charge administrative fees.
6. If the personal data you provided is reported and the company finds it insufficient to verify your identity, or if there are cases of identity theft, misuse, or incorrect data, or if requested by the competent authorities or email server management entities/institutions, the company reserves the right to temporarily suspend the delivery service to your associated email account.
7. The duration of UPMOST's use of your personal data: From the time you apply for newsletter subscription, until two years after the cessation of this service. The company may not provide further notice when this service is discontinued.
8. You acknowledge that this consent form complies with the requirements of the Personal Data Protection Act and relevant regulations, and you agree that the company may retain this consent form. The use of email responses will be regarded as a written reply, and the company will act according to your expressed intention to either provide or stop UPMOST's newsletter-related services.
9. The intellectual property rights, copyrights, and other rights related to the content of the UPMOST newsletter are protected by applicable laws and regulations.
10. You have the right to request the use, correction, supplementation, deletion, or blocking of your personal data, or to object to the use of your personal data for direct marketing or to receive specific or various marketing materials. Please send any such requests to: service@upmost.com.tw or call: 02-2883-7222, extension Customer Service Department.

goldennet

What is AV over IP?

Product Advantages

Product Appearance

TX Specifications

RX Product Specifications

Network Switch Recommended Model

Product Application

Product List